One vertex per element, one color per generator, with an edge from x to x·s.
(5,6,8,10)(7,11,12,9)(13,14,18,22,19,15,17,21)(16,20,27,28,25,23,26,24)(1,2)(3,4)(13,15,19,14)(16,24,25,28)(17,21,18,22)(20,27,23,26)(2,4)(5,7,8,12)(6,9,10,11)(13,16,17,26,19,25,18,27)(14,20,21,24,15,23,22,28)(2,4)(13,16,17,26,19,25,18,27)(14,20,21,24,15,23,22,28)(16,25)(20,23)(24,28)(26,27) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.